Definition: Open to interpretation.
Also referenced as: Ambiguity (noun)
The word ambiguous was used 13 times across 8 pages
A quadrant diagram illustrates how things compare to one another. You can create one based on exact data (e.g., price of a slice, thickness of pizza-crust) or ambiguous data (e.g., fancy or casual, quality of service, or tastiness).
A weak requirement might be written as: "A user is able to easily publish an article with one click of a button." This simple sentence implies the interaction (one click), the interface (a button), and introduces an ambiguous measurement of quality (easily).
As an example, I once had a client ask for a "homepage made of buttons, not just text." He had no idea that, to a web designer, a button is the way a user submits a form online. To my client, the word button meant he could change the content over time as his business changes.
Postal codes are what we call an exact classification. We can generally rely on the codes to hold steady. If the postal code is 10012, the building is in Manhattan. There's nothing to argue about. It just is.
Movie genres like Comedy and Drama may seem exact. But if you put three movie reviewers in a room and ask them to classify a dark comedy into one of those two genres, they may challenge each other.
For example, in editing this book, Nicole suggested I use the term "Postal code" instead of "Zip code" in the example above. Both would have expressed the point, but one is more exact for our context, which includes readers outside of the United States.
For example, what if I had organized the lexicon in the back of this book by chapter, instead of alphabetically? This might be an interesting way of arranging things, but it would need to be explained, so you could find a term.
Because there are many words for the same thing, exact classifications can slow us down. For example, I recently tried to buy some zucchini at a grocery store. But it wasn't until the clerk in training found the code for "Squash, Green" that she could ring me up.
Later, you overhear a coworker saying, "Sorry, it looks like we're sold out of Michael Jackson right now."
Your manager looks under "J" and checks the inventory, which says the store should have a single copy of Thriller.
You remember that it was part of the shipment of records you just filed. Where else could you have put that record, if not under "J"? Maybe under "M"?
What are five other facets of a vinyl record?
Because your structure may change a hundred times before you finish making it, you can save time and frustration by thinking with boxes and arrows before making real changes. Boxes and arrows are easier to move around than the other materials we work with, so start there.